Dust collector



E. A. GLYNN DUST COLLECTOR Dec. 26, 1950 2 SheetsSheet 1 Filed June 22, 1948 ATTORNEYS E. A. GLYNN DUST COLLECTOR Dec. 26, 1950 Filed June 22, 1948 ZSheets-Sheet-Z R O T N E V m ATTORNEYS Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE DUST COLLECTOR Application June 22, 1948, Serial No. 34,426

1 Claim.

This invention is directed to, and it is an object to provide, a novel suction type device for collecting the dust or bufiings from a power driven tire tread buffing machine; it being the practice to buff off the old and worn tread of a tire preparatory to vulcanizing a new tread thereon.

Another object of the invention is to provide a dust collector which embodies a novel assembly of dust receiving hoods, suction ducts, and suction fan; said assembly being adapted especially for use on pedestal type tire tread buffing machines.

A further object of the invention is to provide a dust collector, as above, which includes dust receiving hoods which are of novel configuration, being designed to accomplish the retention, for delivery to the suction ducts, of a maximum part of the buffings from the machine.

An additional object of the invention is to provide a dust collector. as in the preceding paragraph, in which said hoods are adjustable for use with tires of different diameter; such adjustment being made by means of a movable apron arrangement on each hood.

It is also an object of the invention to provide a dust collector, wherein the suction ducts leading to the dust receiving hoods are fitted with manually controlled valves so that the full suction of the device can be imposed selectively on one hood or the other.

A further obiect of the invention is to pro ide a practical, reliable and efiicient dust collector, and yet one which will be exceedingly effective for the purpose for which it is de igned.

The e objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. 1 is a side elevation of a pedestal type tire buffing machine fitted with the improved dust collector.

Fig. 2 is a rear end elevation of the machine and dust collector.

Fig. 3 is a cross section, through one of the dust receiving hoods, on line 3--3 of Fig. 2.

Fig. 4 is a fragmentary cross section on line 4-4 of Fig. 2.

Referring now more particularly to the characters of reference on the drawings, the dust collector is here illustrated as mounted in connection with a pedestal type tire bufiing machine, which includes a base I and an upstanding pedestal 2. At its upper end the pedestal 2 supports an electric motor 3 having spindles or shafts l projecting laterally from opposite ends thereof; each of said spindles being fitted with a rotary bufiing device 5.

A tire supporting and manipulating unit 6 is disposed in front of the pedestal 2 and is secured in connection therewith by a swivel mount 1. The swivel mount 1 permits the unit 6, with a tire 8 thereon, to be manipulated so as to present the tread of such tire to either one of the buffers 5, selectively; said unit 6 including rollers 9 on which the tire 8 may be rotated during the buffing process.

When either of the buffers 5 is acting on the tread of a tire 8, there results a considerable quantity of dust, buifings, and smoke, and the present invention provides an effective collector therefor.

Such dust collector comprises the following structural arrangement:

The electric motor 3 includes motor bosses Hi, to which attachment members I l are secured; said attachment members H each including a pair of collars 52 above, but spaced circumferentially of, said motor 3, with the axis of said collars extending parallel to the shafts 4.

A pair of cross rods [3 extend through the col ars l2, being maintained there n by set screws, as shown; said cross rods projecting, at the ends, in overhanding relation to corresponding ones of the buffers 5.

At opposite ends the cross rods K5 are fitted with attachment brackets M, which are secured to the upper ends of a pair of dust receiving hoods I 5, which depend therefrom. The dust receiving hoods l5 are open at the front, and the corresponding buffer 5 runs in the upper end porton of each hood, with the buffer projecting slightly ahead thereof for tire engagement.

The dust receiving hoods ii are each vertically elon ated, and include side plates 16 which converge rearwardly from the relatively wide open front IE5 of the hood, Additionally, each hood includes a back wall I! and a bottom p ate l8; said back wa l and bottom plate extending at a downward and rearward slope in converging relation to each other, whereby to form a dust receiving pocket iii in each hood at its lower back corner; said pocket l9 thus being lower than the forward edge of the bottom plate !8.

The buffers 5 turn in the direction indicated by the arrow in Fig. 1, and thus the dust or buffin s are dischar ed from said buffers in a generally downward and rearward direction into the hoods and pockets [9 thereof.

The front l6 of each dust receiving hood l5 is generally convex, whereby to permit a supported tire 8 to engage either of the buffers 5 without striking the desired hood. When a tire of relatively small diameter is being buffed, the corresponding hood [5 is adjusted by swinging out from the front thereof a generally U-shaped extension apron 25 pivoted, at its upper ends, as at 21, in connection with the side plates I6 intermediate the ends of the latter. The pivots 2| are preferably bolts with wing nuts. Each extension apron 20 includes a stop flange 22 on its lower front edge, which limits the extent to which said apron may swing into its hood.

The normal position of each extension apron 20 is shown in full lines in Fig. 3, whereas its outward adjusted position, for use with a small diameter tire, is shown in dotted lines in said figure. Adjacent the bottom and back thereof, and in communication with the pockets iii, the dust receiving hoods [5 are formed with laterally inwardly projecting transition ducts 23 which engage in opposite ends of an intake fitt ng 2% fixed to the bottom of, and arranged in com-- munication with, a vertical axis, fan housing 25. The fitting 2Q includes a removable clean-out plate 26 at the bottom thereof.

A vertical-axis, electric motor 21 is mounted on top of the fan housing 25 and drives a suction fan 23 in sad housing; the latter including a generally tangential discharge neck 23 which projects rearwardly. lhe neck 29 is adapted to engage in a carry-cit duct which may lead to a suitable receiver, such as a dust collecting cyclone (not shown).

The motor 21 is secured to the pedestal 2 by an attachment unit, indicated generaly at 3!, whereby the motor El, fan housing 25, and fitting 24 are all rigid with said pedestal. Further, as the transition ducts 23 are fixed to the hoods l4 and engage in the fitting 2d, the lower ends of said hoods are stabilized.

Each of the transition ducts 23 is fitted with an upwardly movable, gate-type valve 32 slidably carried in guides 33; there being a control rod 34 extending upwardly from each gate 32 to a point above the cross rods 13 for manual access by the operator.

The outer side plates 16 of the hoods 15 are fitted, at the upper ends thereof, with removable end covers 35, whereby to permit of access to the buffers 5 for removal thereof for the purpose of repair or replacement.

When the above described dust collector is in use, with the motor 2'! running, and causing a suction in the intake fitting 24, the valve 32 corresponding to the bufier 5 which is in use, is open, and the other of said valves 32 is closed, so that the entire suction is on the corresponding dust receiving hood 15. The dust, buffings, and smoke from the bufier 5 in use feed downwardly in the corresponding hood 15 into the pocket 19, and thence are picked up by the suction and drawn through the adjacent duct 23 into the fitting as. From the fitting 2 the accumulated dust, bufiings, and smoke are drawn through the fan housing 25 and are discharged through neck 29 into the carry-off duct 39.

The arrangement is such that very little of the dust, buffings, and smoke, from a tire tread hurling operation, escapes the adjacent hood 5%.

The described configuration of the hoods i5 is of material advantage in the accomplishment of this result. In this connection the tapering of each hood I5 from its open front 16 to its back wall 1?, together with the downward inclination and convergence of said back wall I1 and bottom plate 3 to form the pocket 19, are all of importance.

5 The configuration of the hoods I5 is such that there is no material surging of the dust, buffings, -or smoke forwardly out of the open front 16 of said hoods.

The described dust collector for tire buffing machines thus provides an efiective and practical device for the intended purpose, yet without interfering in any way with normal operation of the buffing machine.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device,

still in practice such deviations from such detail may be res ed to as do not form a departure from the spi it of the invention, as defined by the appended claim.

Having tl: is described the invention, the folas new and useful, and upon is Fatent are desired? n: a vertically disposed pedestal,

1 disposed driven spindle proe of the motor, a rotatable ed on the end of each spinpedestal for supporting and nto and out of engagement einents, a pair of longitudibosses on the motor, a pair of n boss, such collars being spaced tially with respect to the allel 1 tn axes of the spindles, a rod in each co r and projecting outwardly in overhangi" relation to the abrading elements, an iment bracket supported at the outer end EDT/VIN A. GLYNN.

ERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 289,986 Coy -ec. 11, 1883 502,833 Aug. 8, 1893 787,349 Middleton Apr. 11, 1965 619,021 Mueller et al. Apr. 24, 1905 1,1 5,533 Platt Aug. 3, 1915 1,177,342 Leiinan et a1. Mar. 28, 1916 1,217,996 Partridge Mar. 6, 1917 1,283,948 Stevens Nov. 5, 1913 1,476,195 Dobyne Dec. 4, 1923 1,912,491 Minett June 6, 1933 2,064,871 Angradi Dec. 22, 1936 2,282,355 Linderoth May 12, 1942 2,361,351 Willmott Nov. 10, 1942 FOREIGN PATENTS Number Country Date 15,63 1 Stat Britain Apr. 21, 1910 351,663 France July 22, 1955 373,549 Germany Apr. 13, 1923 

